Breakdancer- Break the mobo back down to just the CPU/HSF, 1 stick of RAM and video card and RESET CMOS/BIOS and the reboot and go through the troubleshooting routine again. NEVERMIND- posted before I read page 2. Let us know how it goes with the new mobo. The new PSU was a good idea, what kind did you get? Troubleshooting is tough. You have to, very methodically, break it down to what you think is wrong and then go for that fix. If no change then try the next best thing etc. At least you have learned the process and can troubleshoot pretty well now. I think you had at least two problems with this board, one being the PSU and the other possibly the mobo or the RAM. It is really hard to troubleshoot two completely different problems on a new build so if you get it working then congrats and well done.